纪念一下我用winform DesignSurface遇到的难点

研究过窗体设计器的都知道，鼠标事件几乎都被屏蔽掉，都被用去做拖动和选择的一些功能。

重新添加鼠标事件的方式如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.ComponentModel.Design;
using System.Windows.Forms;

namespace DesignSurfaceExt
{
    public enum MyMouseButtons
    {
        Leave = 0,//鼠标移出 
        Move,//鼠标移入
        LeftDown,//鼠标左键down
        LeftUp, //鼠标左键up
        DoubleClick,//鼠标双击 
        RightDown,//鼠标右键down
        RightUp,//鼠标右键up
        Wheel//鼠标滚轮动
    }
    public class EventMouse : System.Windows.Forms.Design.ControlDesigner
    {
        private MyMouseButtons MouseState = 0;

        private ISelectionService SelectionService
        {
            get
            {
                return this.GetService(typeof(ISelectionService)) as ISelectionService;
            }
        }

        //鼠标动作常见参数：
        //鼠标移动：512
        //鼠标左键：
        //down:513 up:514
        //double click:515
        //鼠标右键：
        //down:516 up:517
        //鼠标滚轮：522
        /// <summary>
        /// 获取鼠标消息
        /// </summary>
        /// <param name="m"></param>
        protected override void WndProc(ref Message m)
        {
            Control t_Control = System.Windows.Forms.Form.FromHandle(m.HWnd) as Control;
            if (m.Msg == 515)//鼠标双击 
            {
                MouseState = MyMouseButtons.DoubleClick;

            }
            //else if (m.Msg == 513) //鼠标左键down
            //{
            //    MouseState = MyMouseButtons.LeftDown;
            //    //System.Console.WriteLine("鼠标左键down");
            //}
            //else if (m.Msg == 514) //鼠标左键up
            //{
            //    MouseState = MyMouseButtons.LeftUp;
            //    //System.Console.WriteLine("鼠标左键up");
            //}
            //else if (m.Msg == 516)//鼠标右键down
            //{
            //    MouseState = MyMouseButtons.RightDown;
            //    //System.Console.WriteLine("鼠标右键down");
            //}
            //else if (m.Msg == 517)//鼠标右键up
            //{
            //    MouseState = MyMouseButtons.RightUp;
            //    //System.Console.WriteLine("鼠标右键up");
            //}
            //else if (m.Msg == 522)// 鼠标滚轮
            //{
            //    MouseState = MyMouseButtons.Wheel;
            //    //System.Console.WriteLine("鼠标滚轮");
            //}
            //else if (m.Msg == 512)// 鼠标移入
            //{            
            //    MouseState = MyMouseButtons.Move;
            //    //System.Console.WriteLine("鼠标移入");
            //}
            else
            {
                MouseState = MyMouseButtons.Leave;
                //System.Console.WriteLine("鼠标移出");
            }
            switch (MouseState)
            {
                case MyMouseButtons.DoubleClick:
                    mouseDoubleClick(t_Control.GetType());
                    break;
                default: break;
            }
            base.WndProc(ref m);
        }

        private void mouseDoubleClick(Type type)
        {
            if (type == typeof(UserControlTest))
            {
                //弹出消息框
                System.Console.WriteLine("你好");
            }
        }
    }
}

新建一个类，继承ControlDesigner，然后重写他的鼠标消息函数，再到你需要有这些鼠标事件的控件上加上一句，如下：

[Designer(typeof(EventMouse))]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace DesignSurfaceExt
{
    //[Designer(typeof(MyDesigner))]//显示右上角三角功能
    //[Designer(typeof(EventControlDesigner))]
    [Designer(typeof(EventMouse))]
    public partial class UserControlTest : UserControl
    {
        public UserControlTest()
        {
            InitializeComponent();
        }
    }
}

这样就可以啦